<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title></title>
	<script  src="http://libs.baidu.com/jquery/1.7.2/jquery.min.js"></script>
	<style type="text/css">
		.fixedNav{
			 position:fixed; 
			 top:0px;
			 left:0px;
			 width:100%;
			 z-index:100000;
			 _position:absolute;
			 _top:expression(eval(document.documentElement.scrollTop));
		}
	</style>
	<script>  
        window.onload = function() {
        	for (var i=0; i<200; i++) {
        		$("#div1").append("asdf<br>");
        	}
        	
		}
    </script> 
</head>
<body>
	<div class="fixedNav" id="div">
	    <p>导航固定</p>
	</div>
	
	<div id="div1">
		
		
	</div>
</body>
</html>
